<?php
///////////////////////////////////////////////////////////////////////////
//																	   //
// NOTICE OF COPYRIGHT												   //
//																	   //
// Moodle - Modular Object-Oriented Dynamic Learning Environment		 //
//		  http://moodle.com											//
//																	   //
// Copyright (C) 1999 onwards  Martin Dougiamas  http://moodle.com	   //
//																	   //
// This program is free software; you can redistribute it and/or modify  //
// it under the terms of the GNU General Public License as published by  //
// the Free Software Foundation; either version 2 of the License, or	 //
// (at your option) any later version.								   //
//																	   //
// This program is distributed in the hope that it will be useful,	   //
// but WITHOUT ANY WARRANTY; without even the implied warranty of		//
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the		 //
// GNU General Public License for more details:						  //
//																	   //
//		  http://www.gnu.org/copyleft/gpl.html						 //
//																	   //
///////////////////////////////////////////////////////////////////////////

require_once($CFG->dirroot.'/grade/export/lib.php');

class grade_export_ods extends grade_export {

	var $plugin = 'ods';

	/**
	 * To be implemented by child classes
	 */
	function print_grades() {
		global $CFG;
		require_once($CFG->dirroot.'/lib/odslib.class.php');

		$export_tracking = $this->track_exports();

		$strgrades = get_string('grades');

	/// Calculate file name
		$downloadfilename = clean_filename("{$this->course->shortname} $strgrades.ods");
	/// Creating a workbook
		$workbook = new MoodleODSWorkbook("-");
	/// Sending HTTP headers
		$workbook->send($downloadfilename);
	/// Adding the worksheet
		$myxls =& $workbook->add_worksheet($strgrades);

	/// Print names of all the fields
		$myxls->write_string(0,0,get_string("firstname"));
		$myxls->write_string(0,1,get_string("lastname"));
		$myxls->write_string(0,2,get_string("idnumber"));
		$myxls->write_string(0,3,get_string("institution"));
		$myxls->write_string(0,4,get_string("department"));
		$myxls->write_string(0,5,get_string("email"));
		$pos=6;
		foreach ($this->columns as $grade_item) {
			$myxls->write_string(0, $pos++, $this->format_column_name($grade_item));

			/// add a column_feedback column
			if ($this->export_feedback) {
				$myxls->write_string(0, $pos++, $this->format_column_name($grade_item, true));
			}
		}

	/// Print all the lines of data.
		$i = 0;
		$geub = new grade_export_update_buffer();
		$gui = new graded_users_iterator($this->course, $this->columns, $this->groupid);
		$gui->init();
		while ($userdata = $gui->next_user()) {
			$i++;
			$user = $userdata->user;

			$myxls->write_string($i,0,$user->firstname);
			$myxls->write_string($i,1,$user->lastname);
			$myxls->write_string($i,2,$user->idnumber);
			$myxls->write_string($i,3,$user->institution);
			$myxls->write_string($i,4,$user->department);
			$myxls->write_string($i,5,$user->email);
			$j=6;
			foreach ($userdata->grades as $itemid => $grade) {
				if ($export_tracking) {
					$status = $geub->track($grade);
				}

				$gradestr = $this->format_grade($grade);
				if (is_numeric($gradestr)) {
					$myxls->write_number($i,$j++,$gradestr);
				}
				else {
					$myxls->write_string($i,$j++,$gradestr);
				}

				// writing feedback if requested
				if ($this->export_feedback) {
					$myxls->write_string($i, $j++, $this->format_feedback($userdata->feedbacks[$itemid]));
				}
			}
		}
		$gui->close();
		$geub->close();

	/// Close the workbook
		$workbook->close();

		exit;
	}
}

?>
